US4652253A - Method for preparing flat-bottom thermoplastic sack - Google Patents

Method for preparing flat-bottom thermoplastic sack Download PDF

Info

Publication number
US4652253A
US4652253A US06/642,611 US64261184A US4652253A US 4652253 A US4652253 A US 4652253A US 64261184 A US64261184 A US 64261184A US 4652253 A US4652253 A US 4652253A
Authority
US
United States
Prior art keywords
forming
tube
sack
transverse
bag
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/642,611
Other languages
English (en)
Inventor
Gordon L. Benoit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pactiv LLC
Original Assignee
Mobil Oil Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mobil Oil Corp filed Critical Mobil Oil Corp
Assigned to MOBIL OIL CORPORATION A NY CORP reassignment MOBIL OIL CORPORATION A NY CORP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BENOIT, GORDON L.
Priority to US06/642,611 priority Critical patent/US4652253A/en
Priority to NZ213012A priority patent/NZ213012A/en
Priority to AU45858/85A priority patent/AU578965B2/en
Priority to AT85305693T priority patent/ATE56916T1/de
Priority to EP85305693A priority patent/EP0173506B1/en
Priority to DE8585305693T priority patent/DE3579875D1/de
Priority to CA000488979A priority patent/CA1249471A/en
Priority to KR1019850005957A priority patent/KR860001707A/ko
Priority to ES546252A priority patent/ES8702827A1/es
Priority to BR8503939A priority patent/BR8503939A/pt
Priority to JP60182864A priority patent/JPS6172537A/ja
Priority to ZA856320A priority patent/ZA856320B/xx
Publication of US4652253A publication Critical patent/US4652253A/en
Application granted granted Critical
Assigned to TENNECO PLASTICS COMPANY reassignment TENNECO PLASTICS COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MOBIL OIL CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/86—Forming integral handles or mounting separate handles
    • B31B70/872—Forming integral handles on bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • B31B70/266—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement involving gusset-forming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/36—Folding sheets, blanks or webs by continuously feeding them to stationary members, e.g. plates, ploughs or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/86—Forming integral handles or mounting separate handles
    • B31B70/874—Forming integral handles or mounting separate handles involving punching or cutting

Definitions

  • the present invention relates to methods and systems for preparing a thermoplastic sack, and, more particularly, to methods and systems for preparing such a sack having at least a substantially flat rectangular bottom.
  • One type of bag contemplated for preparation by a system and process of the present invention is more particularly defined in copending U.S. patent application Ser. No. 606,120, filed May 2, 1984, now U.S. Pat. No. 4,554,192, the disclosure of which is in its entirety incorporated by reference herein.
  • the bag structure of said patent application is of a thermoplastic film material and it comprises front and rear bag walls connected by gusseted side walls.
  • the bag has an open mouth top portion, which is characterized by having handles located at opposite end regions thereof, said handles each being of two films as a result of being integral extensions of said front, rear and gusseted side walls.
  • the bag has a bottom wall planarly extensible so as to form a rectangle with at least no substantial excess film outside of the bulk volumetic capacity of the bottom region of said bag. By “no substantial excess” is meant no excess over that necessary to form seam seals.
  • An alternative manner of describing the bottom of such a bag is that said bottom is formed from integral extensions of said front, rear and side walls and the closure thereof is 4 two-film, gusset-to-wall heat seals, when said bottom is a square, and 4 two-film, gusset-to-wall heat seals and 1 two-film, front wall-to-back wall heat seals when said bottom is a rectangle.
  • the present invention also contemplates forming the same type of bag without handles.
  • a further object of the present invention is to present novel systems for the preparation of such thermoplastic film flat bottom sacks.
  • the present invention is concerned with the method for preparing an at least substantially flat, rectangular-bottom thermoplastic flexible film sack comprising:
  • the present invention is also concerned with the method for preparing a handled, at least substantially flat, rectangular-bottom thermoplastic flexible film sack comprising:
  • a tab member is an integral extension of the bag mouth opening and each tab member has a pre-weakened region, such as perforations therein; so that when all tabs are fastened together, individual bags may be detached from the tab structure.
  • FIG. 1 is a plan view, in schematic form, illustrating a system and process sequence of one form of the present invention.
  • FIG. 2 is a plan view of another form of the process and system of the present invention.
  • FIG. 1 there is illustrated a system and process sequence 50 for forming a handleless, gusseted, flat-bottomed thermoplastic sack.
  • a hollow cylinder or tube of thermoplastic film 12 formed by inflation thereof just after extrusion, is in the process of being collapsed by being passed through a collapsing and gusset-forming means 14.
  • the tube is prepared by means well-known in the art for bubble-forming thermoplastic film.
  • the device 14 can be of any construction which accomplishes the steps of collapsing the tube and forming oppositely disposed gussets therein.
  • Device 14 can be a sheet-metal device which has an entrance side for receiving a flexible tube of cylindrical film.
  • Sheet-metal plates therein cause an infolding or gusseting of any desired dimension from a fraction of an inch to several inches e.g. about 3 inches, to be fashioned in the structure as the tube passes therethrough.
  • the exit dimension progressively diminishes to present a fully collapsed gusseted tube.
  • Dotted lines 16 illustrates an example of the extent of infolding of the oppositely disposed gussets.
  • the collapsed, lay-flat, gusseted tube progresses to a station 18 which thermally impresses a seal line 20 between the front and rear panels of the collapsed gusseted tube, transversely across the mid-section of said collapsed tube between the spaced-apart gussets.
  • a coextensive, pre-weakened transverse line 22 next closely adjacent and parallel to said transverse sealed seam 20 is effected.
  • a convenient manner of forming a pre-weakened transverse line is by forming a line of perforations by any piercing means through the layers of film. Instead of being coextensive this preweakened line 22 can extend across the full width of the tube.
  • the seamed and pre-weakened gusseted tube thereafter traverses two plates 24, each of which extend into the full reach of the gusset 16. These plates can be coated with some suitable non-stick material to prevent molten thermoplastic polymer from adhering to it. Thereafter, four triangular sections are removed from the gusseted tube. The triangular sections are removed by means which will result in leaving a sealed and severed line 26 and a cut line 28 on both sides of the collapsed tube.
  • the severance and seal line 26 is best effected by a Teflon-coated resistance wire heated to a temperature which will melt through and seal along line 26.
  • a cutting member simultaneously or subsequently will sever each gusset fold along line 28 for a distance equal to the depth of the gusset fold.
  • two pairs of superimposed triangular sections of film, on each side of the gusseted tube will be removed from the tube.
  • the triangular members are bounded by line 26, 28 and the included side edge of the tube.
  • the four removed sections will be returned for recycling with any other scrap film.
  • the result of this action will yield handless bags interconnected along pre-weakened line 22 and effectively bottom sealed with lines 20 and 26.
  • These interconnected bag structures may be rolled upon themselves to form a cylindrical package. Alteratively, they may be collected in a zig-zag folded stack arrangement. In both cases the collected interconnected bags are ready for individual severance and use.
  • the bags also may be individually separated and folded or stacked.
  • seal line 26 touches or overlaps the ends of seal line 20 in order to ensure a series of bottom seal lines that do not contain gaps. It is preferred that seal line 26 touch and pass beyond the ends of seal line 20 and extend to pre-weakened line 22.
  • Seal and severance line 26 is a diagonal line which extends over the portion of the tube width corresponding to the gussets along lines diagonal to the length of the tube and the seal pairs of opposite sides of the collapsed tube are at an angle to one another, preferably at an angle of at least approximately 90°.
  • the seams of each pair of seams on each side of the gusseted tube are in registration with one another. In other words, beneath seam 26, and on the other side of Teflon-coated separator plate 24, there is an identical seal line 26.
  • the four triangular sections adjacent to seals 26 can be removed subsequent to the formation of seal line 26.
  • preweakened line 22 is formed across the full width of the tube.
  • Seal lines 26 are then formed so as to bond the gusset folds together but not sever them.
  • the structures are then separated and stacked to a predetermined count, e.g. 100, so that all tops and all bottoms are in registration.
  • the four triangular double fold sections beyond or outside of the seal lines 26 are removed by any suitable means, e.g. a cutting member. The result is a stack of handleless bags which can be gusset-expanded to yield a flat bottom.
  • a linear low-density polyethylene tubular film 12 of about 0.75-1 mil. in thickness is collapsed and simultaneously gusseted by passing through a gusset-forming means 14. This action then folds the collapsed tube to yield gussets 16.
  • seal line 20 and perforated line 22 are simultaneously formed.
  • triangular regions bounded by sever and seal lines 26, severance line 28 and the outer edge of the gusset are removed from the collapsed tube.
  • bag blanks 40 can be convolutely wound into a roll of bags, interconnected at pre-weakened lines 22. Alternatively, the bag blanks can be separated along line 22 and stacked for packaging and for use.
  • 50a illustrates a system and process sequence for forming a handled, gusseted, flat-bottomed flexible thermoplastic sack and sack pack.
  • a tube of thermoplastic film is collapsed to a lay-flat condition so as to have gussets 16 formed therein.
  • the gusseted tube progresses to a station 30 where seal line 20 is impressed between the front and rear panels of the collapsed tube, as in FIG. 1.
  • seal line 20 is impressed between the front and rear panels of the collapsed tube, as in FIG. 1.
  • a coextensive pre-weakened transverse line 22 is effected closely next adjacent to, and parallel to said transverse sealed seam 20.
  • seal line 32 is formed across the full width of the gusseted collapsed tube.
  • Seal line 32 is of the same type as 20 in that it seals but does not sever the films.
  • seal 32 will be the seal in the handle loops of the finished bag.
  • the gusseted portion of the tube traverses two Teflon-coated plates 18.
  • four sealing and severing seams are diagonally formed in the gusset region and the Teflon-coated plates prevents severed lines 26 from sticking to each other.
  • severing lines 28 sever the gusset folds along lines which are extensions of said pre-weakened line 22. This action removes four double thickness triangular regions from the gusset area at the bottom of the bag blank beyond or outside of seals 26. At this point, the bag bottoms are effectively sealed but still interconnected to the top of an adjacent bag blank.
  • the bag blanks can then be severed along pre-weakened line 22, stacked to a height of 50, 75, 100, etc., and a suitable handle and bag mouth fashioned through the stacked blanks to yield a pack of bags.
  • the bag handles and bag mouth opening can have a variety of shapes.
  • the plurality of bags may be fastened together, for example, at a tab 36, as shown in FIG. 2.
  • a convenient means of fastening the bags together at each tab pair, is by ultrasonic, thermal welding.
  • Individual bags can be torn from the pack along lines such as that illustrated by pre-weakened line 38 of FIG. 2.
  • the bag packs also can have an orifice in each tab 36 to accommodate suspension of a bag pack. This will complete the formation of a handled sack, the bottom of which can be planarly extended so as to have a flat bottom.
  • planarly extended is meant that the bag is extended in internal volume to its utmost by expanding the gussets fully, thereby forming a flat bottom, rectangular in nature, having a length greater than its width.
  • the four triangular sections adjacent to seals 26 can be removed subsequent to the formation of seals 26.
  • preweakened line 22 is formed across the full width of the tube.
  • Seal lines 26 are then formed so as to bond the gusset folds together but not sever them.
  • the structures are then separated and stacked to a predetermined count, e.g. 100, so that all tops and all bottoms are in registration.
  • the four triangular double fold sections beyond or outside of seal lines 26 are removed by any suitable means, e.g., a cutting member. Simultaneously or subsequently, at the opposite end of the stack, a suitable die cutting member can remove part of the stack so as to form a pair of handles, a bag mouth opening and a suitable tab member as shown at 34, 36 and 38.
  • stacks of structures would be assembled as described immediately above with the triangular sections are still attached but with the following modification.
  • each structure is separated from its succeeding structure it is stacked in registration and bonded to its preceeding structure.
  • the bonding is effected with hot needles which pierce through the top structure, at least to the next structure, melt bonding each structure to the adjacent structure.
  • the details of this technique is disclosed in copending application Ser. No. 404,175, filed Aug. 2, 1982 now U.S. Pat. No. 4,526,639. This application is incorporated herein by reference, in its entirety.
  • the hot pin bonding is effected in an area which will ultimately be removed during handle and bag mouth forming.
  • This hot pin bonding insures stack registration stability during stack movement as the remainder of the process is carried out. Thereafter, the stack is permanently bonded together, by any suitable means in an area which will ultimately become the suspension and tear-off region of the pack. After bonding, either simultaneously or sequentially the triangular sections are removed, as by cutting; and the handles bag mouth opening, and intermediate tab region 36 are formed by an appropriate die cutting member. During this action or subsequently, a suspension orifice is formed closely adjacent to and above the point of bonding in the tab region. At the same time or thereafter, the preweakening can be formed in the tab area above the lowest amplitude of the stress relief areas at the base of handles 34.
  • the resulting bag pack will be similar to a stack of bags produced as in FIG. 2 but having common bonding in tab area 36, an adjacent suspension orifice and a preweakened tear-off line 38.
  • Bags of the structures described can be formed by employing any suitable thermoplastic material, for example, a polyolefin film.
  • a polyolefin film it is used generically to include all polymer species, including, for example, low-density polyethylene, linear low-density copolymers of ethylene and another alpha-olefin, high-density polyethylene, mixtures and blends of the same, and other monomer counterparts, etc.
  • the bag film can be of any gauge, for example, from about 0.3 to about 5 mils in thickness.
  • the angle between the diagonal seal line and the bottom seal be at least approximately 135° when said bag is in its lay-flat condition. It is also preferred that the open-mouth portion of the handled sacks of the present invention have stress-relief curves or arcs extending from the base of the handle to a raised portion of the bag mouth. This will militate against splitting or tears occurring in the bag mouth during handle extension or when the bag is being filled with any bulky material.
  • the handles and bag mouth opening can have any configuration.
  • the pertinent angles need not be precise, e.g., exactly 90°, 45°, or 135°.
  • Reasonable processing latitude should permit some deviation from these guidelines.
  • the ends thereof can be curved or angled in order to accommodate or ensure good closure at all film interfaces and joints. Double or plural line seams and seals are also contemplated.

Landscapes

  • Making Paper Articles (AREA)
  • Laminated Bodies (AREA)
  • Bag Frames (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Cell Separators (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Revetment (AREA)
US06/642,611 1984-08-20 1984-08-20 Method for preparing flat-bottom thermoplastic sack Expired - Lifetime US4652253A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US06/642,611 US4652253A (en) 1984-08-20 1984-08-20 Method for preparing flat-bottom thermoplastic sack
NZ213012A NZ213012A (en) 1984-08-20 1985-08-06 Forming flat rectangular bottomed gusseted plastics bags
AU45858/85A AU578965B2 (en) 1984-08-20 1985-08-07 Methods for preparing flat-bottom thermoplastic sack and systems therefore
AT85305693T ATE56916T1 (de) 1984-08-20 1985-08-12 Verfahren zum herstellen eines stapels von thermoplastischen saecken.
EP85305693A EP0173506B1 (en) 1984-08-20 1985-08-12 Methods for preparing a stack of thermoplastic sacks
DE8585305693T DE3579875D1 (de) 1984-08-20 1985-08-12 Verfahren zum herstellen eines stapels von thermoplastischen saecken.
CA000488979A CA1249471A (en) 1984-08-20 1985-08-19 Methods for preparing flat-bottom thermoplastic sack and systems therefore
KR1019850005957A KR860001707A (ko) 1984-08-20 1985-08-19 평저(平底)를 가진 열가소성물질 봉지의 제조방법 및 시스템
ES546252A ES8702827A1 (es) 1984-08-20 1985-08-19 Un metodo de producir una bolsa de pelicula de termoplastico flexible de fondo rectangular al menos sustancialmente plano.
BR8503939A BR8503939A (pt) 1984-08-20 1985-08-19 Processo para confeccionar pelo menos uma sacola de pelicula flexivel termoplastica de fundo retangular e sistema para confeccionar pelo menos uma sacola de pelicula termoplastica de fundo retangular
JP60182864A JPS6172537A (ja) 1984-08-20 1985-08-20 平底熱可塑性サツクの製造方法及びその装置
ZA856320A ZA856320B (en) 1984-08-20 1985-08-20 Methods for preparing flat-bottom thermoplastic sack and systems therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/642,611 US4652253A (en) 1984-08-20 1984-08-20 Method for preparing flat-bottom thermoplastic sack

Publications (1)

Publication Number Publication Date
US4652253A true US4652253A (en) 1987-03-24

Family

ID=24577299

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/642,611 Expired - Lifetime US4652253A (en) 1984-08-20 1984-08-20 Method for preparing flat-bottom thermoplastic sack

Country Status (12)

Country Link
US (1) US4652253A (pt)
EP (1) EP0173506B1 (pt)
JP (1) JPS6172537A (pt)
KR (1) KR860001707A (pt)
AT (1) ATE56916T1 (pt)
AU (1) AU578965B2 (pt)
BR (1) BR8503939A (pt)
CA (1) CA1249471A (pt)
DE (1) DE3579875D1 (pt)
ES (1) ES8702827A1 (pt)
NZ (1) NZ213012A (pt)
ZA (1) ZA856320B (pt)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4816104A (en) * 1984-05-02 1989-03-28 Mobil Oil Corporation Methods and systems for preparing flat-bottom thermoplastic sack
US5215275A (en) * 1990-05-30 1993-06-01 Paul Gold Plastic bags roll and method for making same
US5709641A (en) * 1996-03-26 1998-01-20 Tenneco Packaging Inc. Thermoplastic bag structure
US5799793A (en) * 1993-09-09 1998-09-01 Tenneco Packaging Inc. Easy-open bag pack, method of forming and system
US5935367A (en) * 1996-12-11 1999-08-10 Tenneco Packaging Inc. Apparatus and method for forming handles in plastic bags
US6059707A (en) 1998-03-27 2000-05-09 Tenneco Packaging Inc. Easy to open handle bag and method of making the same
US6742321B2 (en) 2002-09-30 2004-06-01 Gates Automation, Inc. Flange alignment and grasping assembly for bag handling apparatus
US6779922B2 (en) 2000-05-02 2004-08-24 Gates Automation, Inc. Bag for automated filling and sealing machine
US20050259892A1 (en) * 2004-05-20 2005-11-24 Tan Gregorio L Pre-cut plastic bag roll, method and apparatus for making same
US20160107813A1 (en) * 2013-06-04 2016-04-21 Maverick International (Pty) Ltd Flexible Container
US20160272349A1 (en) * 2015-03-18 2016-09-22 Kellogg Company Flat-Bottom Stand-Up Bag, Vertical Form, Fill, And Seal System And Methodology For Utilizing The Same
CN108638580A (zh) * 2018-08-01 2018-10-12 广东顺德博丰塑料机械有限公司 一种制袋机
US20210016946A1 (en) * 2018-08-14 2021-01-21 Pregis Innovative Packaging Llc Inflatable packaging with offset tear initiation features
US11001414B2 (en) * 2015-07-24 2021-05-11 Totani Corporation Plastic bag and plastic bag making apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3725878A1 (de) * 1987-08-05 1989-02-16 Stiegler Maschf Gmbh Tragebeutel aus thermoplastischer kunststoffolie und verfahren zum herstellen von tragebeuteln
DE102004057610A1 (de) * 2004-11-29 2006-06-01 Fev Motorentechnik Gmbh Kraftstoff-Injektor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1120408A (fr) * 1955-03-09 1956-07-05 Holweg Const Mec Sac à provisions et son procédé de fabrication
US3023679A (en) * 1957-08-21 1962-03-06 Continental Can Co Three dimensional bag and method and apparatus for making same
US3537360A (en) * 1968-12-04 1970-11-03 Crown Zellerbach Corp Plastic bag manufacturing method and apparatus
US3857329A (en) * 1970-01-05 1974-12-31 M Lehmacher Fabrication of a carrying bag from thermoplastic synthetic film
US3868891A (en) * 1970-10-05 1975-03-04 Pressure Chemical Corp Machines and methods for the manufacture of containers and the product therefrom
US3915077A (en) * 1974-11-27 1975-10-28 Lee Lafleur Bag forming apparatus
WO1984000322A1 (en) * 1982-07-19 1984-02-02 Paper Converting Newcastle Pty Bag, bag making apparatus and method of use

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320326A (en) * 1940-04-29 1943-05-25 Union Bag & Paper Corp Manufacture of heat sealed bags
GB1040439A (en) * 1963-09-12 1966-08-24 Canadian Ind Method and apparatus for making gusseted plastic bags
US3853664A (en) * 1973-08-01 1974-12-10 Square Bag It Corp Bag making machine and method
NL7903733A (nl) * 1979-05-11 1980-11-13 Wavin Bv Werkwijze voor het vervaardigen van een baan van kunst- stofzakken met twee blokbodems.
US4386924A (en) * 1980-10-23 1983-06-07 Fmc Corporation Handle bag making apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1120408A (fr) * 1955-03-09 1956-07-05 Holweg Const Mec Sac à provisions et son procédé de fabrication
US3023679A (en) * 1957-08-21 1962-03-06 Continental Can Co Three dimensional bag and method and apparatus for making same
US3537360A (en) * 1968-12-04 1970-11-03 Crown Zellerbach Corp Plastic bag manufacturing method and apparatus
US3857329A (en) * 1970-01-05 1974-12-31 M Lehmacher Fabrication of a carrying bag from thermoplastic synthetic film
US3868891A (en) * 1970-10-05 1975-03-04 Pressure Chemical Corp Machines and methods for the manufacture of containers and the product therefrom
US3915077A (en) * 1974-11-27 1975-10-28 Lee Lafleur Bag forming apparatus
WO1984000322A1 (en) * 1982-07-19 1984-02-02 Paper Converting Newcastle Pty Bag, bag making apparatus and method of use

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4816104A (en) * 1984-05-02 1989-03-28 Mobil Oil Corporation Methods and systems for preparing flat-bottom thermoplastic sack
US5215275A (en) * 1990-05-30 1993-06-01 Paul Gold Plastic bags roll and method for making same
US5799793A (en) * 1993-09-09 1998-09-01 Tenneco Packaging Inc. Easy-open bag pack, method of forming and system
US5709641A (en) * 1996-03-26 1998-01-20 Tenneco Packaging Inc. Thermoplastic bag structure
US5967663A (en) * 1996-03-26 1999-10-19 Tenneco Packaging Inc. Thermoplastic bag structure
US5935367A (en) * 1996-12-11 1999-08-10 Tenneco Packaging Inc. Apparatus and method for forming handles in plastic bags
US6059707A (en) 1998-03-27 2000-05-09 Tenneco Packaging Inc. Easy to open handle bag and method of making the same
US6196717B1 (en) 1998-03-27 2001-03-06 Pactiv Corporation Folded thermoplastic bag structure
US6779922B2 (en) 2000-05-02 2004-08-24 Gates Automation, Inc. Bag for automated filling and sealing machine
US6742321B2 (en) 2002-09-30 2004-06-01 Gates Automation, Inc. Flange alignment and grasping assembly for bag handling apparatus
US20050259892A1 (en) * 2004-05-20 2005-11-24 Tan Gregorio L Pre-cut plastic bag roll, method and apparatus for making same
US7093978B2 (en) 2004-05-20 2006-08-22 Gregorio Lim Tan Pre-cut plastic bag roll, method and apparatus for making same
US20060194684A1 (en) * 2004-05-20 2006-08-31 Tan Gregorio L Pre-cut plastic bag roll, method and apparatus for making same
US20160107813A1 (en) * 2013-06-04 2016-04-21 Maverick International (Pty) Ltd Flexible Container
US10011410B2 (en) * 2013-06-04 2018-07-03 Maverick International (Pty) Ltd Flexible container
US20160272349A1 (en) * 2015-03-18 2016-09-22 Kellogg Company Flat-Bottom Stand-Up Bag, Vertical Form, Fill, And Seal System And Methodology For Utilizing The Same
US10239644B2 (en) * 2015-03-18 2019-03-26 Kellogg Company Flat-bottom stand-up bag, vertical form, fill, and seal system and methodology for utilizing the same
US11667415B2 (en) * 2015-03-18 2023-06-06 Kellogg Company Flat-bottom stand-up bag, vertical form, fill, and seal system and methodology for utilizing the same
US11001414B2 (en) * 2015-07-24 2021-05-11 Totani Corporation Plastic bag and plastic bag making apparatus
CN108638580A (zh) * 2018-08-01 2018-10-12 广东顺德博丰塑料机械有限公司 一种制袋机
US20210016946A1 (en) * 2018-08-14 2021-01-21 Pregis Innovative Packaging Llc Inflatable packaging with offset tear initiation features

Also Published As

Publication number Publication date
BR8503939A (pt) 1986-05-27
ZA856320B (en) 1987-03-25
NZ213012A (en) 1987-02-20
ATE56916T1 (de) 1990-10-15
JPS6172537A (ja) 1986-04-14
ES8702827A1 (es) 1987-01-16
KR860001707A (ko) 1986-03-22
DE3579875D1 (de) 1990-10-31
AU4585885A (en) 1986-02-27
AU578965B2 (en) 1988-11-10
EP0173506A2 (en) 1986-03-05
EP0173506B1 (en) 1990-09-26
ES546252A0 (es) 1987-01-16
EP0173506A3 (en) 1986-07-16
CA1249471A (en) 1989-01-31

Similar Documents

Publication Publication Date Title
US4816104A (en) Methods and systems for preparing flat-bottom thermoplastic sack
US4652253A (en) Method for preparing flat-bottom thermoplastic sack
US4655737A (en) Method for preparing flat-bottom thermoplastic sack
US4571235A (en) Methods for preparing flat-bottom thermoplastic sack and systems therefore
US4562925A (en) Thermoplastic bag, bag pack and method of making the same
US6059707A (en) Easy to open handle bag and method of making the same
AU598774B2 (en) Plastic bag and method and apparatus of manufacture
US5507713A (en) Easy-open bag pack, method of forming and system
US5226858A (en) Method and apparatus for producing bags interconnected at their open ends
US5573489A (en) Integral handled layflat thermoplastic bag
EP0163755A1 (en) Square ended bag
US5957824A (en) Bags and method of making bags
US5149201A (en) Angle sealed bottom grocery sack
US4790437A (en) Thermoplastic bag, bag pack and method of making the same
US4699608A (en) Method of making thermoplastic bag and bag pack
US4819806A (en) Thermoplastic bag, bag pack and method of making the same
US4840610A (en) Thermoplastic bag, bag pack and method of making the same
US4604084A (en) Thermoplastic bag, bag pack and method of making the same
CA1251179A (en) Thermoplastic bag, method and system for its manufacture
WO1996038290A1 (en) Die-cut thermoplastic bag with easy open mouth
EP0217982B1 (en) A thermoplastic bag, method and system for its manufacture
CA1245090A (en) Method for preparing flat-bottom thermoplastic sack and systems therefor
EP0215163B1 (en) Methods for preparing flat-bottom thermoplastic sack and systems therefor
US5011298A (en) Halter top bag
US4046065A (en) Rectangular and flat bottom bag and method of manufacture

Legal Events

Date Code Title Description
AS Assignment

Owner name: MOBIL OIL CORPORATION A NY CORP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BENOIT, GORDON L.;REEL/FRAME:004303/0705

Effective date: 19840814

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY